Receiver design for multicarrier CDMA using frequency-domain oversampling

Author

Shi, Qinghua ; Guan, Yong Liang ; Gong, Yi ; Law, Choi Look

Author_Institution

Positioning & Wireless Technol. Centre, Nanyang Technol. Univ., Singapore, Singapore

Volume

8

Issue

5

fYear

2009

fDate

5/1/2009 12:00:00 AM

Firstpage

2236

Lastpage

2241

Abstract

Based on the frequency-domain oversampling and minimum mean-square error (MMSE) principles, we propose three linear single-user detectors for downlink multicarrier codedivision multiple-access (MC-CDMA) systems. We begin with an optimal linear MMSE detector, which is computationally demanding. To reduce the complexity, a two-stage MMSE detector and a diagonal one-stage MMSE detector are developed subsequently. Simulation results show that the proposed detectors can efficiently suppress the multiple access interference (MAI) caused by frequency-selective fading, near-far effect, frequency offset, and nonlinear power amplification.

Keywords

code division multiple access; fading channels; mean square error methods; radio receivers; frequency domain oversampling; frequency offset; frequency selective fading; minimum mean square error; multicarrier CDMA; multiple access interference; near-far effect; nonlinear power amplification; receiver design; Detectors; Diversity reception; Downlink; Fading; Frequency; Multiaccess communication; Multicarrier code division multiple access; Multiple access interference; Time domain analysis; Transmitters; MMSE detection; Multicarrier CDMA; frequency domain oversampling;

fLanguage

English

Journal_Title

Wireless Communications, IEEE Transactions on

Publisher

ieee

ISSN

1536-1276

Type

jour

DOI

10.1109/TWC.2009.080310

Filename

4927432